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Showing posts with the label COLOUR SPACE AND DIGITAL PHOTOGRAPHY

MEMORY IN COMPUTER.

  MEMORY OF COMPUTER: DETAILED EXPLANATION INTRODUCTION MEMORY IN A COMPUTER IS THE MOST ESSENTIAL COMPONENT THAT STORES DATA, INSTRUCTIONS, AND INFORMATION TEMPORARILY OR PERMANENTLY. IT ACTS AS A BRIDGE BETWEEN THE CENTRAL PROCESSING UNIT (CPU) AND THE STORAGE DEVICES, ENSURING SMOOTH DATA PROCESSING AND RETRIEVAL. WITHOUT MEMORY, A COMPUTER CANNOT PERFORM ANY OPERATION. COMPUTER MEMORY IS BROADLY CATEGORIZED BASED ON ACCESS TIME, CAPACITY, COST, AND VOLATILITY . IT DETERMINES THE PERFORMANCE AND EFFICIENCY OF THE ENTIRE SYSTEM. TYPES OF COMPUTER MEMORY COMPUTER MEMORY IS MAINLY DIVIDED INTO PRIMARY MEMORY AND SECONDARY MEMORY , AND ALSO INCLUDES CACHE MEMORY AND VIRTUAL MEMORY AS SPECIAL TYPES. 1. PRIMARY MEMORY (MAIN MEMORY) PRIMARY MEMORY IS DIRECTLY ACCESSIBLE BY THE CPU. IT IS FAST BUT LIMITED IN SIZE AND VOLATILE IN NATURE, MEANING DATA IS LOST WHEN POWER IS TURNED OFF. CHARACTERISTICS: HIGH SPEED LIMITED STORAGE CAPACITY VOLATILE (T...
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DIFFERENT TYPES OF CD'S AND DVD'S

    DIFFERENT TYPES OF CD’S AND DVD’S CDS, OR COMPACT DISCS, COME IN VARIOUS TYPES, EACH DESIGNED FOR SPECIFIC PURPOSES. HERE ARE SOME COMMON TYPES OF CDS: 1.        CD-DA (COMPACT DISC DIGITAL AUDIO):  THIS IS THE STANDARD AUDIO CD FORMAT USED FOR STORING MUSIC. IT HAS A CAPACITY OF 74 OR 80 MINUTES OF AUDIO. 2.        CD-ROM (COMPACT DISC READ-ONLY MEMORY):  THESE DISCS ARE USED FOR STORING DATA AND ARE READ-ONLY, MEANING YOU CANNOT WRITE OR MODIFY THE DATA ON THEM. THEY ARE COMMONLY USED FOR SOFTWARE DISTRIBUTION, GAMES, AND OTHER APPLICATIONS. 3.        CD-R (COMPACT DISC RECORDABLE):  CD-RS ARE WRITE-ONCE DISCS THAT ALLOW YOU TO RECORD DATA ONTO THEM. ONCE RECORDED, THE DATA CANNOT BE ERASED OR MODIFIED. THEY ARE COMMONLY USED FOR CREATING BACKUP DISCS, SHARING DATA, AND BURNING MUSIC OR VIDEOS. 4.        CD-RW (COMPACT DISC REWRITABLE): ...
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DIGITAL IMAGES, DIGITAL IMAGES QUALITIES A SHORTNOTE

DIGITAL IMAGES, DIGITAL IMAGES QUALITIES A SHORT NOTE: THE FOLLOWING TERMINOLOGY IS HELPFUL TO KNOW WHEN LEARNING ABOUT THE TYPES OF DIGITAL IMAGES.   TONAL RANGE  – IT IS ALSO CALLED DYNAMIC RANGE.  THIS TERM REFERS  TO DARK TO LIGHT RANGES OR VALUES IN AN IMAGE USUALLY REFERED TO AS SHADOWS MIDTONES AND HIGHLIGHTS.  AN IMAGE THAT CONTAINS ALL OR MOST OF THE POSSIBLE TONES, RATHER THAN A SMALLER PORTION OF THE POSSIBLE TONES, USUALLY APPEARED  MORE DETAILS AND SAID TO HAVE LARGER TONAL RANGE OR DYNAMIC RANGE.   TONES MAY ALSO REFFERED TO AS LEVELS OR INTENSITIES.   BRIGHTNESS LIGHTNESS LUMINOSITY LUMINANCE   - THESE TERMS REFER TO DARK TO LIGHT TONAL CHARACTERISTICS, AS OPPOSED TO COLOR CHARACTERISTICS.  THEY CAN BE THOUGHT OF AS DESCRIBING THE IMAGE AS IF THE COLORS HAD BEEN CONVERTED TO BLACKS GRAYS AND WHITES   HUE – IT IS IDENTIFIED BY THE NAME OF THE COLOR SUCH AS RED ...
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